A "MOOK" or "MOOKS" is as very subservient person in Caribbean dialect . They they tend to do whatever people want them to especially their significant others.In short they are easily taken advantage of.

a person that is the obvious yet you act like you dont know that they are .... an annoyance.one that bugs you every time you hear/see/smell that person often followed by a short morbidly unconfortable unpleasant glimpse of a memory,making you want to slap the person for bringing that person/subject up in the first place